1.

A does 20% less work than B. if A can complete a piece of work in 7 ½ hours, then B can do it in

Answer»

6 HOURS



B can finish the WORK in 80% of 7 ½ hours of TIME 

7 ½ = 15/2 

Therefore, time taken by B = .8 × 15/2 = 30/5 = 6 hours.



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